Cap for spinning or twisting machines



Dec. 17, 1935.

F. K. HENDRICKSON CAP FOR SPINNING OR TWISTING MACHINES Filed July 19, 1954 INVENTOR.

V Kiugcafinp ATTORNEYS.

Patented Dec. 17, 1935 PATENT oFFieE CAP FOR SPINNING on TWISTING MACHINES Fred K. Hendrickson, Worcester, Mass, assignor to Whitin Machine Works, Whitinsville, Mass, a corporation of Massachusetts Application July 19, 1934, Serial No. 736,059

4 Claims.

This invention relates to spinning or twisting machines of the type known as cap-spinning or cap-twisting frames. In such machines, each bobbin is mounted to rotate within a fixed cap which is open at its lower end, and the yarn is drawn downward outward of the cap and across the lower edge of the cap by the bobbin during the spinning or twisting operation.

In commercial practice, these caps have always been made of metal and in the larger sizes have been very expensive. Furthermore, if the lower edge of a metal cap became worn or injured, repairs could be made only at an unwarranted expenditure of time and labor.

It is the general object of my invention to provide an improved cap for use in a spinning or twisting frame, which is economical in manufacture, satisfactory in use and easily repaired or reconditioned.

A more specific object is to provide a cap having an edge portion which may be easily removed and replaced.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of my invention is shown in the drawing, in which Fig. 1 is a sectional side elevation of parts of a cap spinning frame embodying my improvements;

Fig. 2 is a sectional side elevation of my improved cap, and V Fig. 3 is an enlarged sectional side elevation of the bell portion of the cap.

Referring to the drawing, I have shown a spindle I0 secured in a frame member H and held from rotation therein. A cap C is mounted on the tapered upper end of the spindle it and.

extends downward over a bobbin B on which the yarn Y is wound. The bobbin B is supported on a spindle whirl I2, rotated about the axis of the spindle ill by a driving belt or band 13. The whirl I2 is mounted on a bobbin rail M, and in the usual practice the rail i l, whirls l2 and bobbins B are alternately raised and lowered relative to the fixed caps C.

Each yarn Y is drawn downward through a guide eye l5 vertically aligned with its spindle I0, and each yarn whirls arond its cap C in the usual manner during the spinning or twisting operation. As the yarn is drawn inward and wound on the bobbin B, the lower edge of the cap C forms a guiding surface for the yarn and is consequently subject to substantial wear.

My improved cap C comprises a bell-shaped member having a cylindrical body portion 20, a gradually contracted upper portion 2! and a bearing portion 22 having a tapered opening 23 to fit the tapered upper end of the spindle Ill. The lower edge portion of the cap is preferably flared outward to form a bell portion as indicated at 24. The cap as thus far described is preferably made in one piece by a molding operation from a suitable fibrous material or from a composition such as a synthetic or phenol resin compound.

In order to provide for wear and to protect the lower edge of the cap, I provide a ring 30,

preferably of some hard metal such as steel,

and I secure the ring 30 to the bell portion 24 of the cap as indicated in Fig. 3. The ring 30 is conical in section as shown in Fig. 3, and the inclination of the outer surface of the ring 30 substantially coincides with the angle of the outer face of the bell portion 24.

I preferably reduce the thickness of the bell portion 24 as indicated at 32 to receive the ring 39, and I provide a shoulder 33 in the bell portion 24 of such outside diameter that it will pass readily through the ring 36 when a ring is slipped downward over the body of a cap.

I also provide a semi-circular groove 35 in the shoulder 33 to receive a locking ring 36. The ring 36 is made of spring wire usually and has an opening at one side to permit expansion and contraction.

After the ring 30 has been put in place and the locking ring 36 has been inserted, the ring 30 is held securely on the bell portion 24 of the cap and provides a durable and satisfactory edge for the cap. If the ring 30 becomes worn or injured, it may be readily removed by taking out the locking ring 36, and a new ring 30 may be substituted therefor at slight expense.

I am thus able to provide caps for cap spinning or twisting machines at very much less expense than the cost of all-metal caps, and I also provide caps of an indefinitely long life, as the only portion of each cap which encounters wear is the lower edge formed by the ring 30 and this ring may be repeatedly replaced.

Having thus described my invention and the advantages thereof, I do not wish to be limited 50 to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:-

1. A cap for a spinning or twisting machine comprising a non-metallic and generally cylindrical body portion and a bell-shaped end por- 55 tion, a separate annular yarn-engaging and wear-resisting edge member mounted on said bell portion, and a locking ring effective to detachably secure said edge member to said bell portion.

2. A cap for a spinning or twisting machine comprising a non-metallic and generally cylindrical body portion and a bell-shaped end portion formed in one piece from a phenol resin compound, and a separate annular yarn-engaging and wear-resisting edge member secured to said bell portion.

3. A cap for a spinning or twisting machine comprising a non-metallic and generally cylindrical body portion and a bell-shaped end portion, a separate annular yarn-engaging and wear-resisting edge member, said bell portion being recessed to receive said edge member and having a shoulder which will pass through said edge member and said shoulder having a recess in its vertical face, and a locking spring ring efiective to detachably secure said edge member in place on said bell portion when said ring is seated in saidshoulder recess.

4. A cap for a spinning or twisting machine comprising a non-metallic and generally cylindrical body portion having an open lower end portion, a separate annular metallic yarn-engaging and wear-resisting edge member encircling said lower end portion and engaging an outer surface thereof, and a separate annular locking device efiective to detachably secure said edge member to said end portion.

FRED K. HENDRICKSON. 

